Metal-tapering machine



g- 1929- w. H. MONTGOMERY 1,725,594

METAL TAPERING MACHINE Filed Dec. 1, 1926 s Sheets-Sheet 1 mezzr Aug 9- w. H. MONTGOMERY 1,725,594

METAL TAPERING MACHINE Filed Dec. 1, 1926 3 Sheets-Sheet .2

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METAL TAPERING MACHINE Filed Dec. 1, 1926 3 Sheets-Sheet 3 I l u l atented Aug. 29, 1929.

UNETED STATES mesa WALTER- H. MONTGOMERY, OF LEWISTOWN, PENNSYLVANIA.

METAL-TAPERING MACHINE.

Application filed December 1, 1926.

The object of my invention is to construct a machine which will produce a uniform taper of any desired length or angle on the end of metal bars.

The invention is particularly adapted for use in the manufacture of springs, where it is desired to taper the ends of the spring sections.

In the accompanying drawings:

Fig. 1 is a plan view of my improved machine for tapering metal bars;

Fig. 2 is a sectional view on the line 2-2, Fig. 1;

Fig. 3 is an end View partly in section on the line 3-3, Fig. 1;

Fig. 4: is a detached perspective View of a die; and

Fig. 5 is a fragmentary sectional view on the line 55, Fig. 3.

The particular machine which I will proceed to describe is designed for the purpose of tapering the ends of metal bars which are later formed into springs.

1 is the base of the machine on which are mounted the housings 2, having guideways 3 for sliding-blocks 1, in which are the bearings for the trunnions 5 of a roller 6. 7 is a cross-head forked at the outer end encircling the trunnions of the roller 6 as clearly shown in Fig. 1.

This cross-head has a stub end through which extends the crank-pin 8 of a crankshaft 9 having its hearings in an extension 2 of the housing 2. On the end of this shaft is a gear-wheel 10, which meshes with a pinion 11 on a shaft 12, also having its hearings in the extension of the housing. On the opposite end of this shaft is a gearwheel 13 meshing with a pinion 1 1 on a shaft 15 of an electric motor 16. l/Vhile I have shown the mechanism being driven by an electric motor, it will be understood that other driving means may be used without departing from the essential features of the invention,

Located under the roller 6 is a tapered die 17, as clearly shown in Fig. 4. This die rests upon the heads 18 of the screw-jacks 19. The screws of these jacks extend through openings in the lower portions of the housings, and are raised and lowered by means of worms 20 and worm-wheels 21 which encircle the screws, the worm-wheels being threaded to mesh with the threads of the screws. The heads 18 of the screws are Serial No. 151,977.

rectangular and fit between the walls 22, as clearly shown in Fig. 3.

The worms are mounted on shafts 23 which can be turned by hand to adjust the tapered die 17. One end 24 of the die is curved to fit a curved seat and housing; and bearing against the other end is a screw 25 which looks the die in place.

As the crank-shaft rotates a reciprocating motion is given to the roller 6, so that the metal bars placed on the die 17 will be given uniform tapers of the desired degree.

In order to bring the edges of the piece to a normal width, the metal blank is located in the space w between a fixed die 26 and a movable die 27. This movable die is adapted to slide on the portions 28 of the fixed die and receives its motion from a shaft 30 on which are eccentrics 31. This shaft is mounted in bearings 32 and is driven by a motor 33 through a reducing gear 3 1. Other means of driving this eccentric shaft may be used without departing from the essential features of the invention.

The rods 35 on which the eccentrics are mounted have headed pins 37. The heads of these pins are mounted in heads 38 which are connected to pusher-bars 39 attached to the movable die 27. Extending through the heads 38 are adjusting screws 40 which bear upon the heads of the pins 37.

The adjustment for different Width bars is made by the location of distance pieces in the space between the ends of the rods 35 and the heads 38 of the pusher-bars 39. The fixed die 26 rests upon a bed portion a1 of the housing on which the worm-wheels rest and is held by screw-bolts 412.

In operating the machine, a blank is placed on the anvil and the roller is reciprocated. As the roller reciprocates, the blank is tapered to the proper degree. Then the blank is placed in the space m between the fixed and movable edging dies 26 and 27 which squeeze the blank to bring the edges to a normal width.

I claim 1. The combination in a machine for tapering metal bars, of a base; housings mounted thereon; a die located in the housings; means for vertically adjusting the die, said die being curved at one end to fit a curved bearing; a screw bearing against the opposite end to lock the die position;

guides in the housings; a roller mounted in the guides, said roller being located above the dies; and means for reciprocating the roller.

2. The combination in a machine for tapering bars, of a housing; a die mounted in the housing, said housing having guideways; blocks arranged to slide in the guide- Ways; a roller having trunnions extending into the blocks; a forked rod adapt-ed to the trunnions between the roller and the blocks; and a crank-shaft to which the rod is connected, so that as the crank-shaft is turned, the blocks with the roller Will be reciprocated.

WALTER H. MONTGOMERY. 

